Concrete anchor



FIG. 1 is a perspective view of the concrete anchor of the present invention;

FIG. 2 is a front elevational view thereof wherein the rear elevational view is a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a right side elevational view thereof wherein the left side elevational view is a mirror image thereof. 

The ornamental design for a concrete anchor, as shown and described. 